4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6 #include <asm/percpu.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
11 #ifdef CONFIG_X86_LOCAL_APIC
12 # include <asm/mpspec.h>
13 # include <asm/apic.h>
14 # ifdef CONFIG_X86_IO_APIC
15 # include <asm/io_apic.h>
19 #include <asm/thread_info.h>
21 extern cpumask_t cpu_callout_map;
22 extern cpumask_t cpu_initialized;
23 extern cpumask_t cpu_callin_map;
25 extern int __cpuinit get_local_pda(int cpu);
27 extern int smp_num_siblings;
28 extern unsigned int num_processors;
29 extern cpumask_t cpu_initialized;
31 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
32 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
33 DECLARE_PER_CPU(u16, cpu_llc_id);
35 DECLARE_PER_CPU(int, cpu_number);
38 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
39 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
41 /* Static state in head.S used to set up a CPU */
48 void (*smp_prepare_boot_cpu)(void);
49 void (*smp_prepare_cpus)(unsigned max_cpus);
50 void (*smp_cpus_done)(unsigned max_cpus);
52 void (*smp_send_stop)(void);
53 void (*smp_send_reschedule)(int cpu);
55 int (*cpu_up)(unsigned cpu);
56 int (*cpu_disable)(void);
57 void (*cpu_die)(unsigned int cpu);
58 void (*play_dead)(void);
60 void (*send_call_func_ipi)(const struct cpumask *mask);
61 void (*send_call_func_single_ipi)(int cpu);
64 /* Globals due to paravirt */
65 extern void set_cpu_sibling_map(int cpu);
68 #ifndef CONFIG_PARAVIRT
69 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
71 extern struct smp_ops smp_ops;
73 static inline void smp_send_stop(void)
75 smp_ops.smp_send_stop();
78 static inline void smp_prepare_boot_cpu(void)
80 smp_ops.smp_prepare_boot_cpu();
83 static inline void smp_prepare_cpus(unsigned int max_cpus)
85 smp_ops.smp_prepare_cpus(max_cpus);
88 static inline void smp_cpus_done(unsigned int max_cpus)
90 smp_ops.smp_cpus_done(max_cpus);
93 static inline int __cpu_up(unsigned int cpu)
95 return smp_ops.cpu_up(cpu);
98 static inline int __cpu_disable(void)
100 return smp_ops.cpu_disable();
103 static inline void __cpu_die(unsigned int cpu)
105 smp_ops.cpu_die(cpu);
108 static inline void play_dead(void)
113 static inline void smp_send_reschedule(int cpu)
115 smp_ops.smp_send_reschedule(cpu);
118 static inline void arch_send_call_function_single_ipi(int cpu)
120 smp_ops.send_call_func_single_ipi(cpu);
123 static inline void arch_send_call_function_ipi(cpumask_t mask)
125 smp_ops.send_call_func_ipi(&mask);
128 void cpu_disable_common(void);
129 void native_smp_prepare_boot_cpu(void);
130 void native_smp_prepare_cpus(unsigned int max_cpus);
131 void native_smp_cpus_done(unsigned int max_cpus);
132 int native_cpu_up(unsigned int cpunum);
133 int native_cpu_disable(void);
134 void native_cpu_die(unsigned int cpu);
135 void native_play_dead(void);
136 void play_dead_common(void);
138 void native_send_call_func_ipi(const struct cpumask *mask);
139 void native_send_call_func_single_ipi(int cpu);
141 void smp_store_cpu_info(int id);
142 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
144 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
145 static inline int num_booting_cpus(void)
147 return cpus_weight(cpu_callout_map);
149 #endif /* CONFIG_SMP */
151 extern unsigned disabled_cpus __cpuinitdata;
153 #ifdef CONFIG_X86_32_SMP
155 * This function is needed by all SMP systems. It must _always_ be valid
156 * from the initial startup. We map APIC_BASE very early in page_setup(),
157 * so this is correct in the x86 case.
159 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
160 extern int safe_smp_processor_id(void);
162 #elif defined(CONFIG_X86_64_SMP)
163 #define raw_smp_processor_id() read_pda(cpunumber)
165 #define stack_smp_processor_id() \
167 struct thread_info *ti; \
168 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
171 #define safe_smp_processor_id() smp_processor_id()
173 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
174 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
175 #define safe_smp_processor_id() 0
176 #define stack_smp_processor_id() 0
179 #ifdef CONFIG_X86_LOCAL_APIC
181 #ifndef CONFIG_X86_64
182 static inline int logical_smp_processor_id(void)
184 /* we don't want to mark this access volatile - bad code generation */
185 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
188 #include <mach_apicdef.h>
189 static inline unsigned int read_apic_id(void)
193 reg = *(u32 *)(APIC_BASE + APIC_ID);
195 return GET_APIC_ID(reg);
200 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
201 extern int hard_smp_processor_id(void);
203 #include <mach_apicdef.h>
204 static inline int hard_smp_processor_id(void)
206 /* we don't want to mark this access volatile - bad code generation */
207 return read_apic_id();
209 # endif /* APIC_DEFINITION */
211 #else /* CONFIG_X86_LOCAL_APIC */
214 # define hard_smp_processor_id() 0
217 #endif /* CONFIG_X86_LOCAL_APIC */
219 #ifdef CONFIG_X86_HAS_BOOT_CPU_ID
220 extern unsigned char boot_cpu_id;
222 #define boot_cpu_id 0
225 #endif /* __ASSEMBLY__ */
226 #endif /* _ASM_X86_SMP_H */